Unit 321 District 321 (Region 3)
The high Big Hole valley climbing to the Idaho-line Divide — migratory elk, low-density trophy mule deer, and lots of public ground.
West Big Hole / Beaverhead Range — Region 3 · Last reviewed 2026-07-12
Area
787
sq mi
Public land
65%
approx.
Elevation
6,200–10,600
feet
Motorized
moderate
access
Overview
District 321 spans the western Big Hole Valley and the rugged Beaverhead Mountains that rise to the Continental Divide along the Idaho border in southwest Montana. The valley floor sits above 6,000 feet in broad grassy meadows and wetlands, climbing west into steep, timbered, rocky, high country. This is migratory elk country: good numbers summer in the Big Hole and along the Divide and often linger into archery season, but at the first onset of winter the majority migrate west toward the lower elevations near Salmon, Idaho. Mule deer are low-density but carry good genetics that can yield a trophy from the remote basins. Public land is plentiful.
Terrain
A high, open valley floor over 6,000 feet rising west into the steep, timbered, rocky Beaverhead Range along the Continental Divide and Idaho border.
Cover: Expansive grassy meadows, sedge wetlands, and willow bottoms on the valley floor; lodgepole, spruce, and fir timber with alpine basins and rock in the high Beaverheads.
Landmarks: Big Hole Valley · Beaverhead Mountains · Continental Divide · Idaho border · Big Hole River headwaters · town of Wisdom
Access
The district offers ample public-land opportunity — Beaverhead-Deerlodge National Forest blankets the Beaverhead Range and Divide, with BLM and DNRC state-trust parcels adding access. The famous Big Hole hay-meadow ranches dominate the private valley floor; several enroll in FWP's Block Management program for free public hunting, so check current BMA maps. State-trust parcels are open with a conservation/recreation permit.
Managers: USFS Beaverhead-Deerlodge NF, BLM, private ranch + Block Management, MT DNRC state trust
Access points: Hwy 43 and Hwy 278 through the Big Hole valley · Continental Divide / Chief Joseph Pass area trailheads · USFS roads and trailheads out of Wisdom and Jackson · Big Hole River access sites
Species notes
Rocky Mountain Elk
common qualityMigratory elk are the headline — good numbers summer in the Big Hole and along the Divide and hold into archery season before the first winter storms push the majority west toward Salmon, Idaho.
- →Hunt archery season while elk are still summering high in the Big Hole and along the Divide
- →Locate bugling bulls in the timber and meadow edges in September
- →Understand the migration — a hard early snow can empty the district toward Idaho, so time the rifle hunt to storms
- →Glass the big open Beaverhead basins and timber transitions
Mule Deer
limited qualityLow-density but genetically strong — the remote basins of the Beaverhead Mountains can produce a trophy buck. Deer summer in the Big Hole and migrate out of the valley by early November.
- →Hike into remote high basins where mature bucks hide
- →Glass alpine parks and rock-and-timber edges in early season
- →Hunt before early November — deer migrate out of the valley as winter sets in
- →Expect low densities and be selective
Whitetail Deer
limited opportunityWhitetail hold in the willow and cottonwood bottoms along the Big Hole River and valley ag edges, though mule deer and elk are the district's focus.
- →Still-hunt river bottoms during the November rut
- →Hunt ranch edges via Block Management
- →Glass valley meadows at dawn and dusk
Moose
limited opportunityShiras moose use the Big Hole's extensive willow bottoms and wetlands — a coveted limited-permit species with good habitat here.
- →Hunt willow flats, sedge wetlands, and beaver-pond complexes
- →Glass wet meadows at first and last light
Black Bear
limited opportunityBlack bear inhabit the timbered Beaverhead slopes and berry brush; a scattered spring and fall opportunity in the forest country.
- →Glass green-up chutes and south slopes in spring
- →Key on berry brush and timber openings in fall
- →Confirm species carefully — grizzlies are increasingly documented moving through the Beaverhead Divide
Pro tips
- →Time your hunt to the migration — archery and early rifle catch elk still in the Big Hole, but a hard snow can send them toward Salmon, Idaho fast
- →For mule deer, hike deep into remote Beaverhead basins where the low-density but strong-genetics bucks live, and hunt before early November
- →The Big Hole is brutally cold — pack for sub-zero mornings and heavy snow even in general season
- →Willow bottoms and wetlands make this quality Shiras moose habitat if you draw the permit
- →Use Block Management to reach the private hay-meadow ranches that hold animals on the valley floor
Watch out for
- !Elk migration is decisive — a hard early snow can move the majority of the herd into Idaho, emptying the district
- !Extreme cold and heavy early snow — the Big Hole is one of the coldest valleys in the Lower 48
- !Grizzly bears are increasingly documented along the Beaverhead Divide — carry bear spray and be certain of your bear before shooting
- !Mule deer are low density — expect to work hard and be selective
- !Private hay-meadow ranches hold valley animals — know boundaries and use Block Management legally
Logistics
Base out of Wisdom or Jackson for fuel and limited supplies; Dillon or Butte offer full services. The Big Hole is famously cold and remote — often one of the coldest spots in the Lower 48 — with long drives between towns. Forest roads and trailheads reach the Beaverheads, but the high country is a real backcountry hunt. Cell service is minimal; carry a GPS and satellite messenger.
Nearest towns: Wisdom, Jackson, Wise River, Dillon
Seasons & regulations
This page carries no season dates or regulations. Get current rules from the official Montana sources:
Research sources: GOHUNT Montana Unit 321 Profile (FWP description) · HuntScore HD 321 West Big Hole elk · USFS Beaverhead-Deerlodge National Forest
FAQ
- How big is Unit 321 in Montana?
- Unit 321 (District 321 (Region 3)) covers about 787 square miles, ranging from roughly 6,200 to 10,600 feet in elevation. Area is computed from the unit boundary polygon.
- How much public land is in Unit 321?
- Approximately 65% of the unit is public land. Primary managers: USFS Beaverhead-Deerlodge NF, BLM, private ranch + Block Management, MT DNRC state trust. Always verify ownership boundaries on the ground.
- What species does the catalog list for Unit 321?
- Rocky Mountain Elk, Mule Deer, Whitetail Deer, Moose, Black Bear. For seasons, tags, and regulations, use the official Montana agency resources linked on this page — this page carries no regulatory information.
Put Unit 321 on your map.
Boundary lines, public/private ownership, topo, and offline maps for this unit — in Baseline Maps, free for 14 days.